Replace my password - Computers & Internet

There are three passwords used at a typical customer site:
the Setup password, the HDD password, and the Power
On password.
Ÿ Power On password:
1. Power off the computer.
20 ThinkPad 390E 2. Remove the battery pack and AC Adapter.
3. Remove the backup battery (RTC) for 20
minutes or use a screwdriver to touch the
backup battery (RTC) for 1 second.
4. Put back the backup battery (RTC).
5. Power on the computer and wait until POST
ends.
6. Verify that the password prompt does not
appear.
Ÿ Supervisor and HDD passwords:
The Supervisor password and Hard Disk password
(Hard Disk1 and Hard Disk2) are security features
that are used to protect the system and the hard disk
drive data from unauthorized access. No overriding
capability is provided, so it cannot be replaced if they
are forgotten. If the customer forgets the Supervisor
password, the system board must be replaced. If the
customer forgets the Hard Disk password, the hard
disk drive must be replaced.

If you want to create a new Basic Input/Output System (BIOS) password on a Dell Optiplex 745, reset the password. Resetting the password also applies if you want to remove an existing BIOS password. BIOS passwords are used to add an additional level of security to your machine. Without the correct BIOS password, your Dell Optiplex 745 will not complete the boot process. The password can be reset whether you know your current password or not.

Turn off your Dell Optiplex 745. Start the computer. Press "F2" the moment the Dell logo appears on the screen. You will only have two to three seconds to press the key. Enter your BIOS password. Navigate to the "Exit" screen. Select the "BIOS Password" setting. Enter your BIOS password and a new password if desired. Do not enter anything in the "New Password" box if you want to remove the BIOS password completely. Press "Enter" to save your password settings. Reset Forgotten Passwords Turn off your Dell Optiplex 745 and remove the power cord from the computer. Disconnect any external hardware and cables. Slide the release latch located on the back of your Optiplex 745. Lift the cover as you slide the latch. Hold the cover firmly and pivot it back on the hinges. Remove the cover from the hinges. Find the "PSWD" jumper on the motherboard. This is a two-pin jumper and should be clearly labeled. Use a flashlight and magnifying glass if you have trouble locating it. Remove the jumper from the motherboard. Replace the cover and slide it into place until the latch snaps into place. Reconnect the power cable and restart your computer. Shut down the computer after it has completely restarted. Disconnect all cables and remove the cover again. Replace the PSWD jumper. Replace the cover. Reconnect all cables and restart your computer.
b> Clearing forgotten passwords http://phubner.eng.ua.edu/Files/Optiplex 745/advfeat.htm - wp1117484

first of all u need to find out if it is your hard disk password or your bios password, if its you hard disk passwords all you can do is to replace the hard disk, and if even after replacing your hard disk you are prompted for a password than its your bios password , in this case you need to replace your EPROM

have admin password? if so log in as admin and reset password or pull the cmos pin on motherboard turn on machine then off, replace cmos pin and reboot

Easiest way to wipe clean the Bios password is as follows:

• Perform a power drain by removing laptop battery pack and/or docking station power supply and hold power button down for 10 seconds
• Locate the CMOS battery (usually under the smallest panel on the bottom of the laptop)
• Remove CMOS battery for 20 minutes (20 is arbitrary can wait longer if you wish)
• Replace CMOS battery and panel
• Replace battery pack and/or replace to docking station
• Power up

The Bios password should now be removed and you should be able to boot with no issues. Thank you for using Fixya and please remember to return to rate this answer.
Greg

Which password ? Bios password . Just replace the cmos . Windows password please try safe mode and login as the admin . It should not ask you for a password. GO into control panel and then change the password in the user account option .

Remove the RTC battery for at least 15 monutes then replace. Get into BIOS and reset date and time. Removing the Coin-Cell Battery

1. Follow the instructions in Before You Begin.
   
   
2. Remove the hinge cover (see Removing the Hinge Cover).
   
   
3. Remove the keyboard (see Removing the Keyboard).
   
   
4. Insert a plastic scribe into the guide on the side of the coin-cell battery compartment, and pry out the battery.
   
   

Replacing the Coin-Cell Battery

1. When you replace the battery, insert it at a 30-degree angle under the clip with the positive (identified by a plus [+] symbol) side up, and then push it into place.
   
   
2. Replace the keyboard (see Replacing the Keyboard).
   
   
3. Replace the hinge cover (see Replacing the Hinge Cover).
   
   

You will have to remember it. IBM puts a security chip on the motherboard, the bios password is burned into this, and there is no way around it. There are a few places that will replace the chip, but they are very expensive. The only other way is to replace the motherboard. I've found that replacing the motherboard is cheaper than having the chip replaced, so, if possible, remember the password.

You wont be able to get in with out it, try removing the hard, and power up unit

1 system baord password (if it is a system baord password you may have replace mother board

2 hard drive password (take out the drive power unit up to see it if is on the drive,, if unit boot up,, replace hard drive

can you pls described it to me, where the password pop-up when you use your pc?